Metalliferous dyestuffs and process of making same



Patented Mar. 12,1935

PATENT orrlce METAL LI FER OUS DYESTUFFS AND I PROCESS'OF'MAKING SAIVIE Fritz Straub and Hans Mayer, Basel, Switzerland, assignors' to Society of ChemicallIndusti-y-in Basle, Basel; Switzerland- No Drawing. Application .iuned, 1933, Serial No.

674,776.. In Switzerland July'22, 1932 El-Claims. (01. 260- 12) The present invention relates to metalliferous dyestuffs. It comprises theprocess of making same, as well as the new dyestuffs themselves.

According to the present invention non-sulfonated metalliferous dyestuffs can be made in a very advantageous manner by treating nonsulfonated dyestufis containing groups capable of forming lakes, with agents yielding metal, in an alkaline medium and in the presence of aliphatic hydroXy-carboxylic acids.

This novel metallizing process makes it possible on the one hand to convert such non-sulfonated dyestufis containing lake-forming groups which cannot be metallized by any known process into .their complex metal compounds, and on the other hand, in most cases, ,to obtain complex.

metal compounds which have muchmore -favore able dyeing qualities, for instance in respectiof purity oftint and fastness, than have been ob-- tained by the known processes;

Aliphatic hydroxycarboxylic acidsor their salts suitablefor the process of this invention are,

for example, lactic acids, tartaric.acids, .glycolic acid, tartronic acid, malic acid dihydroxytartaric acid, citric acid, saccharic acid,'gluconic acid and heptonic acid, or the sodium, potassium and ammonium salts of these. 7 x

The invention is applicable to all dyestuffs con-s taming "lake-forming groups; for instance nonsulfonated monoand polyazo-dyestuffs; which contain in ortho-position to atleast one:azo-.

bridge at least one substituted'or nonesubstituted hydroxyl-group or at least one carboxyl-group or at least one ortho-hydroxy-carboxyl-group, such as is characteristiciof the salicylic acidderivatives; also the invention is applicable to nonsulfonated hydroxyanthraquinones, as well as to non-sulfonated dyestuffs of the triarylmethane,

rseries, the azine series and the oxazine series, so

far as they contain lake-forming groups.

The metallization in presence of aliphatic hydroxycarboxylic acids or their salts is suitable for making monoor poly-metal compounds, for example compounds of chromium, copper, iron, cobalt, nickel, manganese, zinc, vanadium or titanium, with non-sulfonated dyestuiis containing lake-forming groups: moreovenfthere be added in the metallizing processrbesidesthe" aliphatic hydroxycarboxylic acid or itssalt other suitable substances, for example common" salt, Glaubers saltor sodium acetatef The operation may be conducted either in an open vessel or. under pressure and in certain cases may be com-: bined with the production of theparentdyestufi,

for instanceQit-may be carried out in the dyesuch as vinyl resins; styrene resins or the like.

They dye these varnishes and plastic masses yellow to brown to red to violet to blue to green to black shades.

The following examples illustrate the invention,-the parts being by weight:-

7 Example 1 6.18'parts of the dyestufi of the formula from diaz otized 5-nitro-2-amino-l-phenol and ,s-naphthol are suspended in 400 parts of water. and Z J'parts of caustic sodasolution of 30 per cent.]strength'. To the suspension, at 70 C., is addecla feebly alkaline solution of 5.9 parts of chromi'c sulfate, f9 parts. of tartaric acid, 40 parts of water and 29.2 parts of caustic soda solution of 30 per cent. strength. After boiling for 12, hours thechroming"iscomplete. After cooling, the mass is neutralized .with dilute acetic acid and filtered from the precipitated vdyestuil, which is washed and dried" at amoderate temperature. There is, obtained a dark blue powder, which; is slightlysoluble in water but freelysoluble in organic solvents to reddish-blue solutions. From a. solution of the dyestuff in cellulose. lacquer there may be obtained ons'uitabl'e surfaces blue-grey to blue-black coatings. i

By introducing into the same diazo-dyestuff instead of chromium, chromium and cobalt or iron and cobalt, aluminium. and copper in analogous manner violet or violetbrown or even violet dyeing dyestufis are obtained.

If the dyestufi from diazotized 4-chloro-2- amino l phenol and, ,B-naphthol is chromed in 1 organic solvents to a blue-violet solution. A so1ua similar manner or is treated for introduction of chromium and iron, there is obtained a dyestuff containing chromium or chromium and iron, which gives to cellulose lacquer on a suitable surface coatings which are respectively blueviolet or brown-violet and fast to light.

The dyestuff of the formula from diazotized 4-chloro-2 amino-l-phenol and 2,3-hydroxynaphthoic acidanilide' yields, when chromed in presence of tartaricacid a chromiferous dyestuff which is a black-blue powder; this dissolves very sparingly inwater but freely in tion of this dyestufi in a nitrocellulose lacquer or an acetylcellulose lacquer coated on a suitable support, for instance metal sheet, yields coatings whicl1 are blue-violet. V p

Grey blue coatings are obtained by 'means of the chromiferous dyestuffs made in presence of tartaric acid from diazotized 5-nitro-2-amino-lphenol and 2,3-hydroxynaphthoic acid anilide.

. E m 2 V 8.26 parts of the dyestufi of the formula from diazotized 4-nitro-2-amino-1-phenol and l-benzoybl-hydroxynaphthalene, 400 parts of water and 2.7 parts -of caustic soda solution of 30 per cent. strengthare heated together to boiling and the whole is mixed with 'a solution made from 5.9 parts of chromic sulfate, 9 parts of'tartaric.

acid, 40 parts of water and 29.2 parts of caustic soda solution of 30 per cent. strength.' After boiling the mixture for 12 h'oursithe chromingis complete. The dyestuff hasby'then"completely separated; it is filtered and washed until neutral.

When dry it is a violet black'powderwhich' dissolves freely in organic solvents to a brownish- I violet solution. In nitro-cellu'lose. lacquerj or 1 acetyl-cellulose lacquer on; a suitablesuppo'rt,

it yields bluish Bordeaux tints.

Emntple'd. 6.51 parts of the dyestuff of the formula -N=N-"o --,o -on,-

' from diazotized 4-chloro-2-amino-1-phen0l and ci a lly usual on metal sheet.

30. per cent. strength ar e'tog ether heated llQ'bOll' I ing and themixture is mixed with asolution of l-phenyl-S-methyl-5-pyrazolone, 400 parts of water and 2.7 parts of caustic soda solution of 30 per cent. strength are heated together to boiling and the whole is mixed with a solution of 5.9

parts of chromium sulfate, 9 parts of tartaric 5" I acid, 40 parts of .water and. 29.2, partsof caustic soda solution of 30 per cent. strength. After boil ing the mixtureifor 10 hours it is neutralized with acetic acid and the dyestuff which has separated is filtered and washed. When dry it is a red powder which dissolves in organic solvents to a 3 yellow red solution and yields scarlet red coatingsfast to lightwhen dissolved in the commernitrocellulose varnishes and applied Instead of. the chromic sulfate an agent yieldingnicklge'l may be used-in which case a dyestufi dyeing yellow orange is obtained.

Like results follow theuse of other aliphatic hydroxycarboxylic acids ortheir salts instead of 20 tartaric acida V g Example 4 6.72 parts of the dye'stuff lot the formula Ill 35 from 'diazotized 4-nitro-2-amino-l-phenol and 1-pheny1-3-methyl-5-pyrazolone, 400 parts of l water and 2.7 :parts ofcausti'c soda solution-of 30 per cent. strength-are togetherheated to 'boil-' ing and there is addeda solution made by allow: ing 48 parts of a chromium fluoride solution containing4'.9 per.cent.'-of CrzOz, 9 parts of tartaric; acidandi27-parts of caustic'soda solution-of 30 percent. strengthlto react with each other; When: the whole has been boiled for 12 hours'chrom'ingis complete; after cooling, the chromium compound is separated by neutralization with acetic I from 'dia'zotiied 5nitro2amino l phenoljgaiid; I

I-phenyl-S-m ethyl-5-pyrazolone, 500 parts on water and 2.1 parts of caustic sodas'olution of 5.9 parts'o'f chromic su'lfate;*9"par ts of tartaric: acid, 40' parts of water and 29.2 parts of 7 caustic soda-solution of 30 per cent. strength. Afterthe whole has been boiled for 10 hours it is mm;

trali'zed with. acetic acid 'and the dyestufi is filtered and washed. When dry it is a brown red powder, sparingly soluble in water, freely soluble in organic solvents to a bluish-red solution. The coatings which are obtained on suitable supports, such as metal sheets, by means of a solution of the dyestuff in nitrocellulose lacquer or acetyl-cellulose lacquer, are bluish red.

Example 6 q I v 6.30'parts of the dyestuii of the formula from diazotized 4-chloro-2-amino-l-phenol and 2,4-dihydroxyquinoline, 500 parts or, water. and

2.7 parts of caustic soda solution of 30 per cent. strength are together heated to boiling. There is then added a solution of ZO'parts ofa chroa mium hydroxide paste of 11.8 per cent. strength in 9 parts of tartaric acid, 20 parts ofwater and 24 parts of caustic soda solution of 30 per cent. strength; the whole is then boiled for 15 hours in a reflux apparatus. After neutralization with acetic acid, the dyestufi is filtered and washed. It is dried at a moderate temperature and is then a brown red powder, very sparingly soluble water and freely soluble in organic-sol vents to a Bordeaux red solution. Nitrocellulose lacquer or acetylcellulose lacquer containing'the dyestuff yields coatings of the same tint. Example? 15.4 parts of 5-nitro-2- amin o-l-phenol are diazotized in the usual manner by 1 means of 29 parts of hydrochloricacid of 3( "per cent. strength and 6.9 parts of sodium nitrite and the product is coupled with a solution of 15 parts of 2-amino-naphthalene inl60 parts of water i and 13.8 parts of hydrochloric acid at 4045 C.

When coupling iscomplete'there are added to the reaction mixture containing the dyestufi of the formula 54 parts of caustic soda/solution of 30 per cent, strength and a solution of 14.1 parts of crystallized cobalt sulfate (CSO4.7H2O) 3.75 parts of tartaric acid, 150 parts of water and 27 parts of caustic soda solution of 30 per cent. strength. The whole is then heated for 1 to 2 hours at 70-75 C. and then mixed with dilute acetic acid until the reaction corresponds with that of a weak alkaline bicarbonate solution; the dyestuff, which is sepfrom diazotized 4-nitro-2-amino-1-phenol and z-amino-naphthalene.

. Example 6 5.97parts of the dyestuff'of the formula from diazotized 4-chloro-2-amino-l-phenol and B-naphthol, 500 parts of water and 2.7 parts of caustic soda solution of 30 percent. strength are heated together to boiling. There are then added the green solution obtained by mixing 4.8 parts of chromic sulfate, 12 part of crystallized cobalt sulfate, 6 parts of tartaric acid, 30 parts of water and 19 parts of caustic soda solution of '30 per cent. strength. The whole is then boiled for 14 hours in a reflux apparatus. After cooling, neutralization with acetic acid, filtration and washing follow. The dry dyestufi is a darkblue powder, soluble in organic solvents toviolet solutions and yielding in nitrocellulose lacquers or acetylcellulose lacquers coatings of the same tinti Violet to violet black coatings are obtained by using the cobaltiferous dyestuff produced in pres enceof tartaric acid fromdiazotized 4-.chloro-2- amino-l-phenol and Z-amino-naphthalene.

Example 9 6.30 parts of the dyestufi' of the formula ture, whereupon it becomes a brownred powder, very sparingly soluble in water but freely soluble in organic solvents to Bordeaux red solutions. Nitrocellulose lacquers or. acetyl-cellulose lacquers containing it'yield brown red coatings;

Example 10 5.50 parts of the dyestuff of the formula OH OH OzN from diazotized -nitro-2-amino-1-phenol and resorcinol are dissolved in 200 parts of water and 2.7 parts of caustic soda solution of 30 per cent. strength. A solution of 1.61 parts of ferric chloride in 20 parts of water, to which has be'enadded 3.6 parts of lactic acid and 16 parts of caustic soda solution of 30 per cent.

- time in a reflux apparatus.

- -lrr l 6.72 parts 6r thedyest'ufi of the formula" from diazo tized '4-nitr0-2-amino 1-phenol and 1-pheny1-3-methyl-5'-pyraz0lone'are'suspended in 400 parts of water and 2.7 parts of caustic soda solution of 30 per cent; strength and, after addition of a solution of 4.6 parts'ofcrystallized manganese sulfate, 30 parts of"water,'8-.5 parts of citric acid and 20-parts of cau'sticscda solution of 30 per cent. strength, the whole is boiled for a short After cooling, the dyestuif is precipitated by neutralization with acetic acid and is filtered and dried. There is thus obtained a yellow red powder, soluble in alcohol to an orange solution; a solution of it in cellulose lacquer on suitable supports yields yellow orange coatings.

Instead of the caustic soda solution indicated in the examples there may also be used other bases, such as, for example, caustic potash solution, amn1onia', soda, potash or borax;

{ Example 12 g 4-5 partsof the metallif erous dyestufi produced in accordance with this invention aredissolved in 1000 parts of a finished cellulose varnishl When the liquid thus colored is spread in a thin layer on various supports (metal, glass,

s leather, earthenware, wood, celluloid, silk or the taining groups capable of forming lake's with agents yielding metal, in an alkaline :medium and in'the presence-of aliphatic,hydroxycarboxylic acids. 7 2. Process-for'the manufacture of=dyestufls containing complexly bound ,metal, consisting intreating the non-.sulfonated;ortho-hydroxyazoe,

dyestuffs with agents yielding metal, in an alkae line medium and in the-presence of aliphatic hydroxycarboxylic'acids." V i 3. Process for' the vmanufacture of; dyestuffs containing complexly bound chromium, consisting in treating the non-sulfonated ortho-hydroxyazo-dyestufis with agentsyielding chromium, in an alkaline medium and in the presence of aliphatic hydroxycarboxylic' acids.

4. Process for the manufacture of dyestufls" containing complexlyrbound chromium, consisting in treating the non-sulfonated 'ortho-hydroXyazo-dyestuffs with 'agents yielding chromium,.in an-alkaline medium andin the presence of tartaric'acid 5. Dyestuffs 7 containing ;complexly I bound,

metal obtainedlby treating the non-sulfonated V products are sparingly soluble in water and freecontaining compleidy bound:

1y soluble in the usual-commercial pyroxyline r varnishes to differently colored solutions. V

'7. Dyestufis containing complexly bound chromium obtained by treating the non-sulfonated ortho hydroxyazo-dyestuffs with agents yielding chromium, in an alkaline medium and in the presence of aliphatic hydroxycarboxylic acids,

which. products are sparingly soluble in water, and freelysoluble in the usual commercial -pyroxyline varnishes to differently colored solutions.-

8. Dyestuffs containing complexly bound chro-' mium obtained by treating the n'on-sulfonated ortho-hydroxyazo-dyestuifs with agents yielding chromium, in an alkaline medium and in the presence of tartaric acid,; which'products are sparingly soluble in Water 'andfreely soluble in the usual commercial pyroxyline varnishes to diiferently colored solutions. I a

' Y Farm sTRAUnT; i HANS MAYER.

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